contestada

"When I pulled the trigger I did not hear the bang or feel the kick—one never does when a shot goes home—but I heard the devilish roar of glee that went up from the crowd." What purpose does the phrase separated by the em dashes serve in this sentence?

The phrase is meant to draw the reader away from the sentence.

The phrase is meant to qualify the author's actions in relation to his first statement.

The phrase is meant to restate the same concept as the first phrase.

The phrase is meant to support the final phrase of the sentence.